Emery-wheel dresser.



H. A. S. HOWARTH; EMERY WHEEL DRESSER. APPLICATION FILED MAY 16, 1908..

Patented Nov. 3, 1908.

PATIENT @lt llCll.

HARRY A. S. HOWARTH, OF NEW HAVEN, CONNECTICUT.

EMERY-WIEEL nanssnn.

Specification of Letters Patent.

Patented Nov. 3, 1908.

Application filed May 16, 1908. Serial N 0. 463,296.

To all whom it may concern:

Be it known that I, IIARRY A. S. How- ARTH, of the city and county of New Haven and State of Connecticut, have invented new and useful Improvements in Emery-WVheel Dressers, of which the following is a full, clear, and exact description, when taken in connection with the accompanying drawings, which form a part thereof.

This invention relates to tools for dressing emery wheels and similar articles. Tools of this kind are usually provided with a forked head of cast metal between the prongs of which are located a plurality of grinding disks. In operation the grinding disks are apt to wear down the soft metal head, and one of the features of the present invention is the application of a U-shaped clip fitting within the slot in the forked head on either side of the grinding disks, which clip is formed of steel or other hard metal. The disks are formed with teeth on their periphery, some of which are formed sharp and some blunt, the blunt alternating at any desired interval with the sharp teeth so that the sharp teeth will be prevented from entering too far into the soft emery wheel, or other article on which the dresser is used. As there are a number of disks which are loosely mounted on their axle, each of which is provided with the same. form of teeth, the liability of any of the teeth cutting into the emery wheel is considerably lessened.

The grinding disks are mounted on a loosely fitting bushing on the axle.

The invention consists of these and other improvements and combinations set forth and claimed hereinafter.

Referring to the drawings, Figure 1 represents a side elevation of an emery wheel dresser embodying the invention, Fig. 2, a

top view of the same, Fig. 3, a central vertical longitudinal section through the same, Fig. l, a detail view in perspective of the clip, Fig. 5, a detail view of one of the disks, and Fig. 6, a section on line 66 of Fig. 2.

In all figures, similar letters of reference represent like parts.

The part designated by the letter A represents a portion of the handle of the tool, and B designates the forked head which is provided with two parallel projecting tines C having a slot D between them.

E designates a screw or axle projecting through the tines C of the head and carrying loosely mounted thereon within the slot D a sleeve or bushing F. Loosely mounted on the bushing F are a series of grinding disks G, which, as shown more particularly in Fig. 5, are provided with a number of sharp pointed teeth H interspersed with a number of blunt or flat headed teeth I. In the particular form shown in Fig. 5, the teeth are so arranged that two of the sharp pointed teeth H alternate with one of the blunt teeth I.

Within the slot D of the forked head B, a clip K is adapted to fit snugly, and the clip is provided with circular perforations for the screw or axle E. The disks, as shown more particularly in Fig. 9., are mounted on the axle between the two parallel sides of the U-shaped clip K, so that in their rotation the teeth of the outer disks cannot scrape or grind on the soft metal of the forked head B. The clip K is provided with an inwardly curved portion L adapted to engage a rounded shoulder M at the base of the slot D between the tines C of the head B. This prevents any rotation of the clip K.

Having now described my invention, what I claim and desire to secure by Letters Patent, is

1. In an emery wheel dresser, or similar article, the combination with a forked head; of a plurality of rotary grinding disks located between the tines of the forked head; and a U-shaped clip projecting on either side of the outer grinding disks, substantially as described.

2. In an emery wheel dresser, or similar article, the combination with a forked head; of a plurality of rotary grinding disks located between the tines of the forked head; and a U-shapcd clip projecting on either side of the outer grinding disk, and held against rotation, substantially as described.

In an emery wheel dresser, or similar article, the combination with a head; of a plurality of independently rotatable grinding disks mounted therein, each having a series of teeth on each periphery, some of which are sharp and some blunt, substanl tially as described.

4-. In an emery wheel dresser, or similar article, the combination with a forked head; of a grinding disk located between the tines of the forked head; and a U-shaped clip be- I of said clip; and a grinding disk loosely 10 tween said tines projecting on either side of mounted on said bushing, substantially as the grinding disk, substantially as described. described.

5. In an emery Wheel dresser, or similar In Witness whereof, I have hereunto set article, the combination With a forked he'ad; my hand on the 25th day of April, 1908. of a U-shaped clip Within the tines of said HARRY A. S. HOVVARTH. forked head; an axle projecting through \Vit-nesses: 7 said head and clip; a loosely mounted sleeve SAMUEL H. FISHER,

or bushing on said axle between the tines ARTHUR H. JEROLMAN. 

